The invention belongs to the technical field of
electric power energy storage, and discloses a high-power-density
flywheel energy storage converter array and a control method thereof.The high-power-density
flywheel energy storage converter array comprises a hierarchical control framework and a
modular unit design and communication and monitoring mechanism and further comprises the hierarchical control framework which is divided into a top layer, a middle layer and a bottom layer, the top layer receives a
power grid dispatching instruction through a communication
bus by a dispatching center to realize switching between a grid-connected mode and an island mode, and the grid-connected mode receives the
power grid dispatching instruction and issues the
power grid dispatching instruction to the middle layer controller. Through the arrangement of the modularized
flywheel unit array, breakthrough improvement can be achieved for the problems of single power limitation and insufficient expansibility, the annular symmetrical
layout design that the N flywheel units are connected in parallel is adopted, flywheel units of different power levels can be flexibly combined, the
system power is expanded from 100 kW to 10 MW in a wide range, and the
system reliability is improved. Compared with a traditional
monomer design, deployment cost is reduced,
electromagnetic interference is reduced through annular
layout, and
system reliability is improved.